The present invention features mass spectrometry data analysis techniques that
can be employed to selectively identify analytes differing in abundance between
different sample sets. The employed techniques determine the statistical significance
of changes to signals associated with mass-to-charge ratios ("m/z-intensity pairs")
between individual samples and sample sets. Based on the statistical significance,
changes likely to indicate analyte level differences are identified. Based on intensities
of the signals, ratios of analyte abundances can be determined.